FXD doesn't have much compression, rear cyl...
#1
FXD doesn't have much compression, rear cyl...
That's what a customer said when he dropped his bike off Saturday at the shop.
So, Monday I run a compression check and get 0 psi in the rear and only 35 psi in the front cylinder.
I pull the rear head and think I know why there's no compression......
So I cal the customer and leave a message to call me back........
I can't wait to here the explanation for this one, rotflol!!!
So, Monday I run a compression check and get 0 psi in the rear and only 35 psi in the front cylinder.
I pull the rear head and think I know why there's no compression......
So I cal the customer and leave a message to call me back........
I can't wait to here the explanation for this one, rotflol!!!
#3
That's what a customer said when he dropped his bike off Saturday at the shop.
So, Monday I run a compression check and get 0 psi in the rear and only 35 psi in the front cylinder.
I pull the rear head and think I know why there's no compression......
So I cal the customer and leave a message to call me back........
I can't wait to here the explanation for this one, rotflol!!!
So, Monday I run a compression check and get 0 psi in the rear and only 35 psi in the front cylinder.
I pull the rear head and think I know why there's no compression......
So I cal the customer and leave a message to call me back........
I can't wait to here the explanation for this one, rotflol!!!
#6
Having never taken a Harley motor apart I have to admit I don't know what the problem is. It appears that the close-up is of the actually of the intake valve and except for being able to see the valve seat I don't see a burned valve, cracked head or anything obvious. I'm assuming the valve is supposed to be concave, which isn't unusual for some engines. When you added oil to the cylinder I'm assuming the pressure didn't increase. Sorry for my inexperience but I would like to know what is wrong.
#7
Trending Topics
#8
Having never taken a Harley motor apart I have to admit I don't know what the problem is. It appears that the close-up is of the actually of the intake valve and except for being able to see the valve seat I don't see a burned valve, cracked head or anything obvious. I'm assuming the valve is supposed to be concave, which isn't unusual for some engines. When you added oil to the cylinder I'm assuming the pressure didn't increase. Sorry for my inexperience but I would like to know what is wrong.
The intake valve has the benefit of the much cooler air/fuel charge entering the chamber while it's open. The exhaust valves get most of the abuse because they're actually open when the hot gases are leaving the combustion chamber while the intake valve is (mostly) closed. Which is why some manufacturers (Ford on its FI 460 in the old days and some other models) use inconel exhaust valves.
I know Manley makes inconel exhaust valves for a Harley and (I think) Ferrea does too.